Which of the following statements about t cells are true? choose all of the correct answers.

a. t cells express tcrs. t cells express bcrs.
b. t cells interact with antigens bound to class i mhc molecules on other cells.
c. t cells interact with antigens bount to class ii mhc molecules on other cells.
d. activation of t cells requires the membrane protein cd4.
e. activation of t cells requires the membrane protein cd8.

Match each term to its best definition? sedimentary depositional enviornment

The chemical form of energy that is useable by the cell to do work

Aresearcher designed an investigation to test what effect eating different types of food would have on blood insulin levels. she selected 10 male subjects who were all 25 years of age and in good health. the experiment took place over 3 days. at 8: 00 a.m. on each day, the subjects ate a meal consisting of only 1 type of food. they had their blood insulin levels measured after consuming the meal. on day 1 they ate a high fat diet, on day 2 they ate a high protein diet, and on day 3 they ate a high sugar diel what is the independent variable in this experiment? a the age of the subjects b the blood insulin level c the type of food consumed d the time of day the meal was consumed